Experimental Visibility Rating, HRRR smoke forecast for 24-04-2024 10PDT

Product
Forecast Hour (forecasts 00,06,12,18 go out to hour 48, others to hour 18)
Surface
KMZ
Loop
0
1
2
3
4
5
6
7
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9
10
11
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31
32
33
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35
36
37
38
39
40
41
42
43
44
45
46
47
48
1000ft
KMZ
Loop
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
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25
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28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
6000ft
KMZ
Loop
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
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30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48

Experimental Surface Smoke, HRRR smoke forecast for 24-04-2024 10PDT

Product
Forecast Hour (forecasts 00,06,12,18 go out to hour 48, others to hour 18)
Surface
KMZ
Loop
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48

Last 6-hourly Visibility forecast for 24-04-2024 5PDT

Product
Forecast Hour
Surface
Loop
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
1000ft
Loop
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
6000ft
Loop
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
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27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48

Last 6-hourly Smoke forecast for 24-04-2024 5PDT

Product
Forecast Hour
Surface
Loop
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48



HRRR visibility product description:
This product is derived from NOAA/NWS HRRR smoke hourly Rapid Refresh updates to support current California wildfire operations. Visibility is calculated by DRI-CEFA-CANSAC based on Malm and Schichtel (2013). Forecasted concentrations of PM2.5 are converted to visibility (in miles AGL) using the algorithm Visual Range (VR) = 870/PM2.5.
Reference: Malm, W.C. and B.A. Schichtel, 2013: Uncertainty associated with estimating a short-term (1-3 hr) particulate matter concentration from a human-sighted visual range. Final report to the Joint Fire Science Program (13-C-01-01).